aolo2

// What we want is the mouse position to stay the same relative to the zoomable object (it's a map in this example)
// To do that we solve the equation "oldMouseRelativePos = newMouseRelativePos" to find the value of newMapOffset.
// We know the values of oldZoom, newZoom, oldMapOffset and mousePos
//
// It is assumed that canvas->screen (something you would use in OpenGL, for example) transform is "(p - offset) / zoom",
// meaning screen->canvas (something you would use in Canvas2D) transform is "p / zoom - offset".
// mousePos is assumed to be in some kind of screen coordinates
// mapZoom is assumed to be zooming relative to the top left corner of the map
//
// "map relative mouse position" is:

mauskin

// The most bare cross-browser drag with no drop function I could do.

// Example:
//
//     make_draggable(
//         thing,
//         () => console.log("let’s go"),
//         (event) => {
//             console.log(event.clientX, event.clientY);
//             element.style.transform = `translate(${event.clientX}px, ${event.clientY}px)`;

mmozeiko

#pragma once

#include <stdint.h>

#define PCG_DEFAULT_MULTIPLIER_64 6364136223846793005ULL
#define PCG_DEFAULT_INCREMENT_64  1442695040888963407ULL

typedef struct {
    uint64_t state;
} pcg32;

ocornut

Memory Optimization (Christer Ericson, GDC 2003)
http://realtimecollisiondetection.net/pubs/GDC03_Ericson_Memory_Optimization.ppt

Cache coherency primer (Fabian Giesen)
https://fgiesen.wordpress.com/2014/07/07/cache-coherency/

Code Clinic 2015: How to Write Code the Compiler Can Actually Optimize (Mike Acton)
http://gdcvault.com/play/1021866/Code-Clinic-2015-How-to

rygorous

#define _CRT_SECURE_NO_DEPRECATE

#include <stdio.h>
#include <string.h>
#include <Windows.h>

// This allocates a "magic ring buffer" that is mapped twice, with the two
// copies being contiguous in (virtual) memory. The advantage of this is
// that this allows any function that expects data to be contiguous in
// memory to read from (or write to) such a buffer. It also means that